I come to Bubble fairly often for the night club. I like that it's dressier than almost everywhere else in CLT, but sometimes they still let girls in with denim shorts or guys with nice dark-wash jeans.
The crowd changes depending on the evening. Magnum Monday caters to the service industry crowd, and can be a pretty wild party sometimes. Thursdays are my favorite night to go out in general, and Bubble tends to have a pretty good crowd without being overly packed. Fridays and Saturdays can get really full and usually the tables are sold out most weekends. The crowd is diverse as far as age, background, and alcohol maturity.
The DJs are okay, I would prefer more edm/dance mix in the music. Wiggs&Wines are my favorite and they are frequently the choice for Mondays. Yona is there often and he has an okay mix of everything. Frenzy is good, too.
As for getting in the door, yes it can be a pain sometimes. The club is a bit small and honestly, it can get uncomfortably full. The waitresses are usually very friendly and attentive; I've had a bad experience but it was cleared up after-the-fact. Tori is really nice.
Great job for their marketing and events. I've walked in a few fashion shows there, as well as attended. I like that they cater to women. I've also seen a few local celebs in the club.
Overall, one of my preferred night clubs in CLT but there is room to improve.